Apparatus for measuring and dispensing liquids



Nov. 10, 1925- 5 0.6 7

R. CROWDER APARArus FOR MEASURING AND DISPENSING LIQUIDS Filed July 31 192s 1B. Crowdar u jnvgnfaz' Patented Nov. 10, 1925 lTED STATES? ore-re e;

APPARATUS FOR EASURING; Ann m'sPEn-snvok LIQUIDS? v Application fiiea mul 31;

To all whom it may qonge-rn:

Be itknown: that I, BeYMo rD (jizowniia;

a citizen of the United States, residing. at Raleigh, inthe county of Wake-- and State of North- Carolina, have invented certain:

new and useful Improvements in- Apparatus for Measuring and Dispensing Liquids; and I' dohereby declare the fol-lowingtobe a full, clear and exact description of the invention,' such as will enable others skilled in the artto which it appertains to make and use; the same.

This invention relates to an apparatus adapted for the genera-l measuring and 'dis pensing: of gasole'ne but especially adapted for measuring and" dispensing the same; to

automobilists and to'other' users It has for its object toprovide a device; of this nature which will be comparatively inex pensive to" manufacture, certain in 'operation',-- and more efic ient in use-than those heretofore'proposed. 4

With these" and other Objects inview, the invention'consists in the novel details of construction and coinbinations'lof parts 1 "a tank, 2 a suction pipe leading therefrom and 3 a pumpycylinder provided with a piston 4, a' piston rod 5,- and any suitable means of. reciprocatingsaid piston, which:

in Figure 1 takes the form of a rack 6; a

pin'ionl, a shaft 8, and an operatinghandle 9; Leading from said cylinder 3 is a pipe 10' delivering into a measuring tank 11, which is provided with an'overflo'vs pipe 12, connected as by the drain pipe 13 to' the tank 1, all as will'be'clear from the drawings.

with the piston 17 having thepiston rod 18 operated'byany suitable means, as: for ex ample the rack 19; associated with'- the pinion 20, and a 'continuation of the shaft drawings I Leading from the bottom of said measuring tank 11' is the delivery pipe 1 1 joining the measuring cylinder 16;!pr0Vided 195s;l seriain diesteav-f m suriega y n e 1691s the de ery-br e? op 8; w xthe-everfl wln pa a. bi ilj ba d-p pe .2 as; an e p nt 2 is a hae lirery ho e .5 Pr vi ed: ith: ii aeui b e noz le, 26, but preferably of the well known-valved yn oiprev nt drip-1 11 t ppe -M 91 t e ts. t e upw m v m n ofiri ntit n t down s roke of th ip t' n.- e.- he" liquidsuckedi therein is forced'up; through the pipe 10and oven-the upperledge; ofithe r. sp s r wo ld; mm; the haf Sil ia a ing th ni's ea nd l to rise and; fall" simultaneously; The j piston Q ite r usuc in quan y o 911 1 1 wh h; p nds up n e d ta cei h r ten' r v sf dx h tt fsgove ed.- by th set; serevii 27 associatedjwith the s tatio a gy. b -W Th s Set sc e ro ta si w h measuring tank; 11. The setserew 27' isu preferably so djust dia Q. a.- se the-piston 4 to suekinfa quantity of fluid-sufficient of the piston l the tank 11; will Witheertai-nty be filled up to'a predetermined point Any surplus fluidgthat may be th usi delivered; intothe tank 11 readily flowsdown through the pipes 12 and 13; back intothe' tank The result is that henever the P15110114 is down fo its I limit of kt/Travel. the tann n is filled accurately, with a predetermined.

quantity o-f fluid. 1 a

The piston 17 rises with; the piston land: when it reaches its upward limit of travel,

-whieh' is: likewise determined by: a screw 30' or bygothe-r suitable means; theyeylinder 'so to slightly; more than fill the tank 11 to a poi t ab ve t n .28: ore-the or fiow Pip 12; thus insuring that at every down stroke 16 will be" accurately filled with a predeteremined amount of fluid, as will? also the pipe 14 leading from the tank 11.. In other} 7 words, when the pistons 4t and 17". areraised to their fullest extent, both' cylinders 3 and 16 will contain predeterminedEquantities of fluid, andwhen the pistons land 17 descend iir-the-"inannenabove disclosed a predetermined quantity of fluid; will be: forced out of thei rcyl-inder i3 into the 1133111511,. andsimultaneous'ly' therewith "a predetermined qua'ntity ofliquid-will be 61C8d 0llti0f the cylinder 16 through-thepipe 21am into the hose 25; as;will be clearf-roni'the drawings. gO-n thedesoent o'f thepistonge the check Valve 31 prevents. the. liquid; from passing-x 1 der 3. The same remarks apply to the check valve 34 associated with the cylinder 16 and pipe 21. In other words, the pipe above the-check valve '33 will be kept constantly full of liquid, the pipe 14 above the check valve 32 will be kept constantly full of liquid, and the pipe 21 beyond the check valve 34 as well as the hose up to the valve '(not shown) in the nozzle 26 will be kept constantly full of liquid' It thus re- 2 sults that each of the displacementsof the piston 4 will deliver the same quantity of liquid into the tank 11, and the displacements of the'piston 17 will each deliver the same quantity of liquid from the nozzle 26. The volume of a displacement of piston 4 being greater than the volume of a displacement of piston 17, as indicated in the draw ings, ample provision is made for the well known losses in devices of this character, due to leakage,evaporation, etc, and therefore, the customer can be convinced that he isgetting his full measure. Especially is this true when the tanks 11 are made transparent as is usually the case.

Further, by making the displacement of piston 17 accurately of the predetermined volume to be delivered to the customer, say, 1- gallon, 5 gallons, or 10 gallons, it serves as a check on the measuring tank 11. That is, if for any reason said tank 11 fails to empty to the last ounce, or through evaporation or leakage since the last filling, it is not as full as it ought to be, then we have the contents of pipe 14 to make up for such losses and to completely fill the cylinder 16, so that for any up stroke of the piston 17,

- no matter how long the time since the preceding up stroke, the customer is certain of getting his full measure. This last named result is still further assured due to the pipe 21 being always tulland its upper end 22 being located at a point higher than tank 11 to prevent'liquid from siphoning out of the same. 1

In the somewhat modified form of the invention shown in Figure 2, the principle of operation isthe same as in Figure 1, but double acting pumps are disclosed, and two measuring tanks are'provided. That is to say, the numerals 1 and 2 represent a liquid supply and a suction pipe respectively, as in the previous case, while indicates a pump cylinder provided with a piston 36, a piston rod 37, a rack 38, a pinion 39, and operating shaft 40, a handle 41 for operating the same, a delivery pipe 42,

emptying into the measuring tank 43, pro

vided with an overflow 44, and a drain pipe 45, leading back to tank 1. To the suction pipe .2, there is joined a suction pipe 46, leading into the cylinder 35; and also to said suction pipe 2 is joined the suction pipe 47 leading into the cylinder 48, provided with the piston 49, a piston rod 50, the rack 51, and operating pinion 52. Connected to the cylinder 48 is the delivery pipe 53, emptying into the measuring tank 54, provided with the overflow pipe 55, connected to the drain pipe 45, as at 56. Leading from the tank 54 is the delivery pipe 58, entering the top of the cylinder 35 as shown, and leading from the tank 43' is the delivery pipe 59, connected to the top of the cylinder 48, as shown. Leading from the top of the cylinder 35 is the delivery pipe 60, which extends to the point 61 located above the upper ends of the overflow pipes 44 and 55, as shown. Leading from the said pipe as at the point 62, is the delivery hose 63, likewise provided wit-h a nozzle 64, provided with a valve not shown to prevent drip. The connection between the top of the cylinder 48 and the delivery pipe 60 permits theupper portion of the said cylinder 48 to deliver into the said pipe 60.

It will be observed that the racks 38 and 51 are so disposed asregards their driving pinions 39 and 52 that when one rack ascends'the otherdescends and vice versa.

The operation of this modified form of the invention is as follows:

Supposing the two cylinders 35 and 48 to be filled with liquid as illustrated, and supposing that the piston 36 is ascending. Its upward motion will suck liquid from the tank 1 through the connections 2 and 46 while at the same time it will force liquid out of the delivery pipe 60 into thehose 63 as will be clear from the drawings. On the other hand, as said piston 36 descends, it

will force liquid through the pipe 42 into the tank 43, and as the capacity of said cylinder 35 on its downward stroke isslightly more than is sufficient to fill the tank 43 above the top of the overflow pipe 44, each downward stroke of the piston 36 amply maintains the necessary supply of fluid in saidtank 43. While said piston 36 is thus descending the pipe 58 maintains the upper portion of-said cylinder 35 full of liquid from the tank 54. It thus results that at each complete stroke of the piston 36, the cylinder 35 is supplied with a predetermined amount of liquid above and below said .piston 36. The stroke of this piston 36 is regulated by the screw 27 supported by the member 28 as in the previous case. In the same way, when the piston 36 rises in the manner above disclosed, the piston 49 will descend, thus forcing the liquid below the same up through the pipe 53 into the tank 54. The set screw .30serves to so regumus-m1 late the upward stroke of piston 4:9ll'1h3tf the amount of liquid thus previously sucked. in and now forced out. of'saidv cylinder 48 will"v slightly, morethan fill the-tank: 534. up: above the top of: the. drain: pipe 55 On the other hand, as the piston 36 descends; in% the manner above disclosed,,the piston 49" said pipe 42 full of liquid above said check In the same way when the piston valve 71. 49 descends, the check valve 72 prevents liquid from flowing through the pipe 2 into the tank 1, and the check valve 73 permits liquid to pass upwardly into the pipe 53 and to fill the tank 54 as shown, while at the same time preventing the flow of liquid back.

into said tank 48, thus maintaining the pipe 53 always full of liquid. When the piston 36 ascends, the check valve 74 prevents liquid from passing back into the tank 54 through the pipe 58, and always maintains said pipe full. In the same. way, the check valve'75 permits liquid to pass into the pipe.

60 and maintains said pipe 60 normally full. hen the piston 49 ascends, the check valve 76 permits liquid to pass into the pipe 60 and prevents liquid from passing from said pipe 60 back into the said tank 48. The

check valve 7 7 prevents liquid from passing up into the pipe 59.

It will thus be clear that in this modified form of the invention, illustrated in Figure 2, the pipes 58 and 59 as well as the pipes 42 and 53 are always kept full of liquid. The same remarks apply to the pipe 60 and hose 63. It therefore follows that any displacements of the pistons 36 and 49 in an upward direction cause an accurate amount of liquid to be delivered through the nozzle 64 to the consumer. It will further be apparent that the measuring chambers above the pistons 36 and 49 act as checks on the measuring tanks 54 and 43 while the pipes 58 and 59 will supply any deficiencies of measure in the same way and for the same reasons as those stated in connection with the operation of the measuring chamber or cylinder 16.

It is obvious that those skilled in the art may vary the details of construction as well as the arrangement of parts without departing from the spirit of the invention, and therefore I do not wish to be limited to the above disclosure except as may be required by the claims.

IVhat is claimed is: I

1. In a liquid measuring and'dispensing livery. 5'

- measuring tank; a valved connection between a paratuss the combination ofifav liqnidl supp y; an measuring; tank. provided withwani through-saidkpipem drain piper-leadmgr -fronn 7,

said overflow ipe: backltosaid supply;--- a: seoondpump oa predetermined: capacity; a. pipe leading: from" said measuring; tank. to;- saidi second pump; and. azpipe-i leading: from;

saidalast: named pump: to the point-of 2. In a liquidmeasuring and dispensing apparatus the combination of a liquid supply; a pair of pump cylinders; a suction connection between one of said cylinders and said supply for drawing a predetermined quantity of liquid from said supply; a measuring tank; avalved connection between one of said cylinders and said tank for delivering said drawn liquid into said tank; 35

a valved connection between said tank and I the other of said cylinders for delivering r the drawn and measured liquid into the lat-' ter; a. reciprocating piston in each cylinder;

means for reciprocating said pistons simultaneously from the same source of power; and valved means for conducting liquid from said other cylinder to the point of delivery 7 3. In a liquid measuring and dispensing ply; a pair of pump cylinders; a suction connection between one of said cylinders and said supply for drawing a predetermined quantity of liquid from said supply; a

one of said cylinders and said tank fordelivering said drawn liquid into said tank; a valved connection betweensaid tank and, the other of said cylinders for delivering the drawn and measured liquid into the latter; a reciprocating piston in each cylinder; adjustable means for limiting the movements of said pistons to govern the volume of their displacements; means for reciprocating said pistons simultaneously from the same source of power; and valved means for conducting liquid from said other cylinder to the point of delivery. I 4. In a liquid measuring and dispensing apparatus th combination of a liquid supa reciprocating piston in each cylinder proapparatus the combination of a liquid 'supply; a pair of double acting pump cylinders;

viding a suction chamber and a delivery chamber in each cylinder; a pair of measur ing tanks; a connection between said supply and each suction chamber; a connection between each suction chamber and one of said measuring tanks; adjustable means for limiting the strokes of said pistons; a power shaft; means associated with said shaft for operating said pistons simultaneously; a de- 7 livery pipe; connections between said pipe and each delivery chamber; and connections v between said measuring tanks and said de-. livery chambers.

5. In a liquid measuring and dispensing apparatus vthe combination of a liquid supply; a pair of double acting pump cylinders; a reciprocating piston in each cylinderprovi'ding a suction chamber and a delivery said measuring tanks; adjustable means for limiting the strokes of said pistons; apower shaft; means associated with said shaft'for operating said pistons simultaneously in opposite directions; a valved delivery pipe; connections between said pipe and each delivery chamber; and connections between said measuring tanks and said delivery chambers. Y

In testimony whereof I affix my signature.

I RAYMOND OROWDER. 

